Roget's 21st Century Thesaurus, Third Edition Copyright © 2013 by the Philip Lief Group.

EXAMPLES FROM THE WEB FOR LOW KEYS

The best tones of the speaking voice are the middle and low keys.

Some of the melodies are new, others familiar, but all are re-arranged and written in low keys to suit children's voices.

Their voices were pitched at low keys and they moved with care, but their smiles were broad and full of a strange glee.